Fine. Make the universe work for it. The whole system becomes more resilient as a result.

Look at our immune system. Incredibly complex and clever, and able to keep us alive in the face of all sorts of pathogens. It exists because of this cat and mouse game, played over millions of years.

There's people in the highlands of PNG who regularly eat each other. Of course, many are thought to have died due to prion diseases. But now these tribespeople seem to have become largely immune to prion disease. Incredible.